audit sampling because sampling involves sampling risk. The higher the tolerable deviation rate, thelower the sample size.Based on your knowledge of Hoopla’s systems, you decide that the first two controls aremoderately important, and that the third control is highly important. The other input needed todetermine sample size is the estimated population deviation rate. Based on past experience with theclient and considering historical rates, you determine that the estimated population deviation ratesfor the three controls are one percent, two percent, and zero percent, respectively.1Darrell decided that since all sales pass through the first two controls and since the tolerabledeviation rate for those controls is the same, he could be more efficient by using the same sampleof transactions to test both controls. He randomly chose 58 sales transactions and tested thedocumentation for evidence of proper credit approval and review of pricing by the sales manager.After finding only one exception for the first control and two exceptions for the second control,Darrell determined that both controls are operating effectively.Now that Darrell has tested the first two controls, you need to test the third one beforemoving on to substantive testing.